Search for dissertations about: "fibre laser"
Showing result 21 - 25 of 58 swedish dissertations containing the words fibre laser.
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21. Processing technologies for long-wavelength vertical-cavity lasers
Abstract : Vertical-cavity surface-emitting lasers (VCSELs) areattractive as potential inexpensive high-performance emittersfor fibre-optical communication systems. Their surface-normalemission together with the small dimensions are beneficial forlow-cost fabrication since it allows on-wafer testing,simplified packaging and effective fibre-coupling. READ MORE
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22. All-fibre optical sensor system for chemical sensing based on fibre Bragg grating technology
Abstract : This thesis deals with the realization of an all-fibresensor system for chemical sensing through the evanescentfield, based on fibre Bragg grating technology. The advantagesof all-fibre systems are most apparent for the potential userof the system. These systems are of small size, have highmobility, and require no precision alignment. READ MORE
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23. Fibre suspension flocculation under simulated forming conditions
Abstract : A flow loop system for study of fibre flocculation insuspensions has been developed. The system is designed tosimulate the flow conditions in a paper machine headbox. It isequipped with a radial distributor feeding a step diffuser pipepackage, after which the flow is contracted in a 2-D nozzle. READ MORE
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24. Optical monitoring and analysis of laser welding
Abstract : After the laser was invented in 1960, it was not long until someone started using this powerful source of light to weld parts together. Laser welding became an industrial application during the 1970's and the field has developed ever since. READ MORE
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25. The Morphology of Laser Arc Hybrid Welds
Abstract : This thesis is about formation of surface imperfections formed in welding when using the manufacturing methods of laser welding and laser arc hybrid welding. In hybrid welding a traditional arc welding source and a laser share the same melt pool, making the process even more complex. READ MORE